Презентация, доклад по английскому языку на тему: Parashuting.

Leonardo da Vinci. In his manuscript, 1495 mention a safe descent from a height "If a person has a tent of starched cloth width of 12 cubits and the height was 12, he can throw from any height without danger to himself."When you consider that the medieval measure of length — the cubit — was equal in different countries between 50 to 60 centimeters, this arrangement provided a safe descent of a person from any height, since the diameter of modern parachutes also not exceed 6...7 meters.

of the idea of a parachute. Ancient records show that in many countries people tried to get down from the towers, the trees, the rocks with the help of various devices, similar to umbrellas. Often, these jumps ended in injury or even death because nobody knew the laws of air resistance, and intuition often failed. Leonardo da Vinci first pointed out the great size of the parachute, and thought balloonists.

the tower in Montpellier. Colorized engraving of the end XVIII in

In 1777, one more Frenchman Jean Dume was sentenced to death, and had to experience the flying cloak of Professor Fontana. In case of success he promised to give life. He has also made the jump from the roof of the prison tower and survived. But actually introduced the parachute — like invented the word — French physicist, Louis-sébastien Lenormand, who 26 Dec 1783 jumped from a tower Montpellier on he invented the parachute, representing a development of umbrella: wooden frame covered linen rubberized cloth.

foldable parachute. She went down in history as one of the first female parachutists.

In 1911, the Russian military G. E. Kotelnikov invented a brand new type of parachute RK-1. Parachute Kotelnikov was compact. Its dome is made of silk lines were divided into 2 groups and were attached to the shoulder straps of the harness. The dome and slings placed in wooden and later aluminum backpack. Later, in 1923, Kotelnikov offered knapsack parachute styling, made in the form of an envelope with the cells for slings. After the revolution, first, forced to jump out of an airplane was made on 23 June 1927 test pilot M. M. Gromov, later hero of the Soviet Union.

beginning of the development of mass parachuting in our country is July 26, 1930. On this day in Voronezh at the Airport began the first jump pilots under the direction of L. G. Minowa.

are successfully operated new sports parachute-type "wing".

In 1934, designer Lobanov proposed a new form of the dome is square and flat, in 1935, a new sports training parachute with a variable rate reduction was enacted in operation. The engineers brothers Doronina first in the world constructed machine for opening the parachute at a predetermined height.

world stage, and Russia, as parachute the all-around, group and dome acrobatics, skysurfing